| Global Commercial Services Group LtdNew | Other | 2 | £275m | 31.2% | 2026-03-23 |
| Lincolnshire County CouncilNew | Other | 2 | £193m | 21.9% | 2025-06-05 |
| National Highways | Other | 5 | £110m | 12.4% | 2024-12-13 |
| Ministry of Justice | Other | 21 | £75m | 8.5% | 2026-04-24 |
| Companies House | Other | 1 | £45m | 5.1% | 2023-09-26 |
| Department for EducationNew | Other | 2 | £38m | 4.4% | 2025-08-26 |
| BANK OF ENGLAND | Other | 15 | £29m | 3.3% | 2025-10-20 |
| RESTORATION AND RENEWAL DELIVERY AUTHORITY LTD | Other | 4 | £21m | 2.3% | 2022-08-15 |
| Cafcass | Other | 2 | £10m | 1.1% | 2023-12-14 |
| H M REVENUE & CUSTOMS | Other | 4 | £9m | 1.1% | 2024-07-23 |
| National Highways Limited | Other | 8 | £9m | 1.0% | 2022-03-24 |
| DfTc - Department for Transport | Other | 6 | £8m | 0.9% | 2025-09-11 |
| the Education Authority | Other | 10 | £6m | 0.6% | 2025-02-03 |
| THE EXTRACARE CHARITABLE TRUST | Other | 1 | £5m | 0.6% | 2022-01-14 |
| THE UNIVERSITY OF BIRMINGHAM | Other | 3 | £5m | 0.5% | 2021-11-08 |
| Rural Payments Agency (RPA)New | Other | 1 | £5m | 0.5% | 2026-03-10 |
| YPO | Other | 3 | £4m | 0.5% | 2023-12-19 |
| Birmingham City Council | Other | 3 | £4m | 0.5% | 2025-05-09 |
| Single Source Regulations OfficeNew | Other | 1 | £4m | 0.4% | 2026-03-27 |
| DEPARTMENT FOR LEVELLING UP, HOUSING AND COMMUNITIES | Other | 1 | £4m | 0.4% | 2022-10-17 |
| capitalEsourcing | Other | 2 | £4m | 0.4% | 2023-05-15 |
| West Sussex County Council | Other | 3 | £4m | 0.4% | 2025-12-29 |
| Home OfficeNew | Other | 1 | £3m | 0.4% | 2024-09-06 |
| Department for Science, Innovation & TechnologyNew | Other | 1 | £3m | 0.4% | 2025-12-01 |
| Department for Work & Pensions | Other | 3 | £2m | 0.3% | 2023-12-08 |
| Security Industry Authority | Other | 1 | £2m | 0.2% | 2020-12-18 |
| The Association of North East Councils Limited | Other | 1 | £1m | 0.1% | 2023-02-20 |
| Crown Commercial Service | Other | 6 | £869k | 0.1% | 2024-06-02 |
| Barts Health NHS Trust | Other | 1 | £634k | 0.1% | 2023-12-20 |
| Department for Transport | Other | 3 | £536k | 0.1% | 2020-05-13 |
| Greater Manchester Combined Authority - Greater Manchester Police | Other | 2 | £486k | 0.1% | 2024-08-22 |
| ADVISORY, CONCILIATION AND ARBITRATION SERVICE | Other | 1 | £458k | 0.1% | 2023-12-07 |
| Ofgem | Other | 2 | £338k | 0.0% | 2021-05-06 |
| Ordnance Survey | Other | 2 | £244k | 0.0% | 2018-04-30 |
| Office of Rail and Road | Other | 3 | £213k | 0.0% | 2024-09-09 |
| The Crown EstateNew | Other | 1 | £169k | 0.0% | 2024-08-30 |
| Liverpool John Moores University | Other | 1 | £164k | 0.0% | 2017-12-07 |
| York CollegeNew | Other | 1 | £150k | 0.0% | 2026-02-12 |
| Highways Agency | Other | 2 | £145k | 0.0% | 2018-01-29 |
| Thames Valley Police | Other | 1 | £124k | 0.0% | 2023-05-16 |
| Walsall Council e-Tendering | Other | 1 | £114k | 0.0% | 2021-09-07 |
| Guy's and St Thomas' NHS Foundation Trust | Other | 1 | £83k | 0.0% | 2020-05-01 |
| The University Of KentNew | Other | 2 | £70k | 0.0% | 2025-08-20 |
| NHS Blood and Transplant (Filton, Bristol)New | Other | 1 | £70k | 0.0% | 2026-02-25 |
| Blood Services South West | Other | 1 | £58k | 0.0% | 2021-07-05 |
| Student Loans Company | Other | 1 | £56k | 0.0% | 2022-08-23 |
| HM Revenue & Customs | Other | 2 | £32k | 0.0% | 2020-01-15 |
| COUNCIL FOR THE CURRICULUM EXAMINATIONS & ASSESSMENT | Other | 1 | £30k | 0.0% | 2019-08-15 |
| HM Treasury | Other | 1 | £10k | 0.0% | 2024-05-01 |
| UNIVERSITY OF SALFORD(THE)New | Other | 1 | £0k | 0.0% | 2025-05-21 |
| CPS | Other | 1 | £0k | 0.0% | |
| University of Plymouth | Other | 1 | £0k | 0.0% | |
| THE UNIVERSITY OF CUMBRIA | Other | 1 | £0k | 0.0% | |
| Scottish Government | Other | 1 | £0k | 0.0% | |
| The Police and Crime Commissioner for Surrey | Other | 1 | £0k | 0.0% | |
| Scottish Qualifications Authority | Other | 1 | £0k | 0.0% | |
| Walsall Council | Other | 1 | £0k | 0.0% | |
| Solihull Metropolitan Borough Council | Other | 2 | £0k | 0.0% | |
| Coventry University | Other | 1 | £0k | 0.0% | |
| Northern Ireland Electricity Networks Limited | Other | 2 | £0k | 0.0% | |
| University of South Wales | Other | 1 | £0k | 0.0% | |
| Royal Borough of Kensington and Chelsea | Other | 2 | £0k | 0.0% | |